Theory of Coupled Multipole Moments Probed by X-ray Scattering in CeB$_6$

Details Theory of Coupled Multipole Moments Probed by X-ray Scattering in CeB$_6$ Theory of Coupled Multipole Moments Probed by X-ray Scattering in CeB$_6$

2004-04-21

arxiv.org/abs/cond-mat/0404498v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

10.1143/JPSJ.73.2948

A minimal model for multipole orders in CeB$_6$ shows that degeneracy of the quadrupole order parameters and strong spin-orbit coupling lead to peculiar temperature and magnetic-field dependences of the X-ray reflection intensity at superlattice Bragg points. Furthermore, the intensity depends sensitively on the surface direction. These theoretical results explain naturally recent X-ray experiments in phases II and III of CeB$_6$. It is predicted that under weak magnetic field perpendicular to the (111) surface, the reflection intensity should change non-monotonically as a function of temperature.

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